# libbrillo: platform utility library libbrillo is a shared library meant to hold common utility code that we deem useful for platform projects. It supplements the functionality provided by libbase/libchrome since that project, by design, only holds functionality that Chromium (the browser) needs. As a result, this tends to be more OS-centric code. ## AOSP Usage This project is also used by [Update Engine] which is maintained in AOSP. However, AOSP doesn't use this codebase directly, it maintains its own [libbrillo fork](https://android.googlesource.com/platform/external/libbrillo/). To help keep the projects in sync, we have a gsubtree set up on our GoB: https://chromium.googlesource.com/chromiumos/platform2/libbrillo/ This allows AOSP to cherry pick or merge changes directly back into their fork. [Update Engine]: https://android.googlesource.com/platform/system/update_engine/